Selenium is an automated testing suite for automating web applications. It is an open-source tool that supports different languages like Java, Python, C#, Perl, Ruby and different browsers (Chrome, Firefox, etc).
Selenium is an open-source tool to automate the web and mobile applications. In order to automate applications, need to configure the setup.
It’s a fast-growing world and incremental changes are the one which are constant, everyone learns from their mistakes and experiments they did in past.